Piston-ring for gasolene-engines.



APPLICATION FILED MAR. 19. 1915.

Patented Mar. 28,1916.

Inventor!- 7 Attornys I HARRY HOMEWOOD AND RICHARD A SGHRUGNAL, OFFRESNO, CALIFORNIA.

PISTON-RING FOB GASOLE NE-ENGINES.

Specification of Letters Patent.

Application filed. March 19, 1915. Serial No. 15,585.

To all whom it may concern:

Be it known that we, HARRY Hoarnwooo and Brennan A. ScnnUoNAL, citizensof the United States, residing at Fresno, in the county of Fresno, Stateof California, have invented a new and useful Piston-Ring forGasolene-Engines, of which the following is a specification. K

The present invention relates to improve ments in piston rings orpackings.

One object of the presentv invention, is the provision of a ring of thischaracter, composed of a plurality of cooperating sections, two of thesections of which are constructed as incasing members so that a normallyexpanding ring may be supported therein and at the same time, effect theothers to produce the desired packing eflect when disposed incooperation with a piston and the cylinder wall.

A further object of the present invention is the provision of a simpleand inexpensive ring of this character, which is easily assembled andreadily placed in the usual recess of a power piston.

With the foregoing and other objects in.

view which will appear as the description proceeds the invention residesin the combination and arrangementoi parts and in the details ofconstruction hereinafter described and claimed, it being understood thatchanges in the precise embodiment of the invention herein disclosed canbe made within the scope of what is claimed without departing from thespirit of the invention.

In the drawings-Figure 1 is a perspective view of the complete ring.section taken through the ring. Figs3, 4 and 5 are perspective views ofthe respective sections of the ring.

Referring to the drawings, the numeral 1 designates the inner section ormember of the ring, said member being an open ring or annulus, l -shapedin cross section, the same being cut or split at 2, at an oblique angle,and such annulus 1 cooperatingwith the outer annulus or ring 3, which isalso formed L-shaped in cross section, withthe flange thereof extendinginwardly, instead of outwardly as in the annulus 1. The annulus 3 is cutor split at an oblique angle as at 4, and such annuli are assembled asshown in Figs. 1 and 2, so that the open portions thereof will be out ofalinement and thus terminate, respectively, the annulus 1 against theFig. 2 is a cross posed between the flange of the annulus 3 and flangeof the annulus 3, and in the annulus 3, the open position 4: terminatingadjacent the flange of the annulus 1. Thus the gas will be preventedfrom passing at any of these points between the piston (not shown) andthe cylinder (not shown).

In order-to properly assemble the two annuli 1 and 3, so that the samewill assumethe position as shownrin Figs. 1 and 2 an open r ng 5 cut orsplit obliquely at 6 is disposed to rest upon the flange of the annulusadjacent the edge of the annulus 1, and nor mally having tends to expandthe annuli 1 and 3 so that they will properly engage the walls of thecylinder of the engine and thus produce the desired tight joint betweenthe piston and the cylinder,

It will be noted that the cylindrical flange of the inner split ring 1overlaps the cylindrical flange of the outer split ring 3, and

that the other or flat flange of the ring. 1' 1 overlaps the edge of thecylindrical flange of the ring 3, while the other or flat flange of thering 3 is spaced from the cylindrical flange of the ring 1 to provide aspacefdr accommodating the split ring 5 which is disposed between theflat flange of the ring 3 and the cylindrical flange of the ring 1. Itwill thus be seen that the open portions of the respective annuli of thepresent ring, as clearly illustrated in Fig. 1, will be out ofalinement, it being especially desirable that such open portions will beapproximately at the one-third points of the complete circumference ofthe packing ring, so that the cut portion of the expanding ring 5 willbe interthe body portion of the annulus 1. It will thus be seen that thepassage of gas through the respective open portions of the sections orannuli of the present ring will be prevented by the solid portion ofeither one of the annuli but that all of the sections will be normallyheld together by the protected open annulus 5 which is a straight openring, the open portion of which is cut at an oblique angle instead ofstraight as is the usual practice.

What is claimed is.

A piston packing embodying inner and outer split rings of L-shaped crosssection having overlapped cylindrical flanges, the outer flange of theinner ring overlapping the edge of the cylindrical flange of the outerPatented Mar. 28, 1916.

an expanding action which ring, and a split ring between the other asour aim, We have hereunto affiz zed our flange of the outer ring and thecylindrical signatures in the presence of tWo Witnesses.

flange of the inner ring, the third mentioned IIARRY HOMEWOOD.

ring being extensible to expand the outer RICHARD A. SCHRUGNAL. 5 ring,and the split portions of the three rings Witnesses:

being out of alinement. Bnssm K..LARK1Ns,

In testimony that We claim the foregoing" M. B. HARRIS.

